All of the cuts will be from back office functions, as Centrica continues in its efforts to try and streamline the energy supplier.
"In the first half [of 2007], management's rigorous approach to efficiency and cost control continued," Centrica chairman Roger Carr said in the report.
"Headcount in the UK has been reduced by more than 1,000 and British Gas is part way through its restructuring programme designed to increase control and accountability, and deliver a significant reduction in its operating cost base."
British Gas made an operating profit of £533 million in the first half of 2007.
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